Rheinische Post is reporting that the T-Mobile unit of Deutsche Telekom has completed a deal to be the iPhone’s exclusive carrier in Germany. The report, which is a preview of a larger story set to run tomorrow, claims that the iPhone will sell for around 450 euros — around $612 — and will hit stores Nov. 1. The report did not cite any sources. Previous rumors concerning the iPhone in Europe have stated that Vodafone, as well as…